Evaluation design and reporting in machine-learning state-of-health estimation on the NASA lithium-ion battery dataset — a systematic meta-research review of open-access studies

Pre-registered protocol (v1.2, 14 October 2026) and supporting materials for a systematic meta-research review of evaluation design and metric reporting in machine-learning state-of-health estimation studies using the NASA PCoE lithium-ion battery dataset. Includes the protocol, the dedicated search export (OpenAlex, 14 October 2026), the screening log for 3,157 records, the pre-registered random processing order of 398 candidates and the 25% verification sample, the blank extraction form and codebook, and the screening code. Deposited before full-text data extraction. A parallel OSF registration was submitted on the same day; its archiving failed because of an OSF-side file-copy error and is being resolved.